The term 'arranged in thin plates' can be summarized by the word 'laminar, ' which is a seven-letter word. Laminar refers to a type of flow in which the fluid or gas moves in parallel layers, with no disruption between them. This type of flow is often seen in aerodynamics and fluid dynamics, where it is used to reduce drag and turbulence. It is also used in many other applications, such as in the production of paper and other materials.